Stuffing box loader



Sept. 8, 1931. F..H. BROWN I 1,822,562

STUFFING BOX LOADER Filed Jan. 6, 1931 III!" "MIEIEMMMM! FRANKLIN BROWN,OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CUPLOK- PACKING COMPANY, OFPHILADELPHIA, PENNSYLVANIA, A CORPORATION OF Fatented Sept. 8 1931UNITED STATES PATENT OFFICE DELAWARE STUFFING BOX LOADER Applicationfiled January 6, 1931. .Serial No. 506,949.

This invention relates to stufiing box loaders and particularly to aloader including a barrel wherein the packing for the stufling box maybe placed, the barrel having a mov- '5 able plunger whereby the packingfor the stufiing box may be forced into the stuffing box.

The general object of this invention is to provide a very simple andstrong loader of 10 this character whereby stufling boxes may be keptfilled with packing and as the packing in the stufiing box is worn, newpacking forced into place.

A further object is to provide a device of this character particularlyadapted to be used where there is back pressure such as steam pressure,and which is so constructed that this back pressure or fluid pressuremay -be shut off from access to the loading barrel to permit the plungerof the loading barrel to be removed, packing inserted therein and theplunger replaced, communication then being established between thebarrel and the A further object in this connection is to provide a slidemounted upon the. stuffing box and carrying the barrel and plunger,which slide is capable of being shifted to carry the loading barrel outof a position in alinement with the stufling box opening, the slideacting to close the opening under the circumstances and prevent theescape of pressure from the stufiing box, the slide, of course, beingshiftable reversely to carry the ing, after the barrel has been filledwith plastic packing, into a position registering with the stuffing boxopening.

Other objects will appear in the course of the following description.

My inventionis illustrated in the accompanying drawings, wherein andloader therefor, the loader being constructed in accordance with myinvention.

shown in Figure l, and

Figure 3 is a section on the line 3+3 of Figure 1.

Referring to these drawings, A indicates a stufilng box or gland of anysuitable charpackgland or stuffing box is the slide 10 which isillustrated as segmental in form. This is pivoted upon the face of thestufiing box by means of a cap screw 11, the upper face of the stuflingbox being surfaced so that the slide and stufling box have closeengagement with each other. The free end of the slide 10 is formed withan arcuate slot 12 through which another cap screw 13 passes. By turningthese cap screws down, the plate or slide 10 may be forced into tightengagement with the face of the stulfing box and by loosening the screw13, the slide may be released so thatit may be shifted.

Mounted upon the slide is the loading barrel 14 whose interiordiameteris the same as 7 that of the opening a and which is so disposedupon the slide that it may be moved into a position of registry with theopening a. The upper end of the barrel 14 is closed by a screw threadedcap 15, this cap being annular in plan and having interior screw threadsengaging with screwthreads on a plunger 16. This plunger at its upperend has a head whereby a wrench may be applied and the lower end of theplunger carries the swivelled head 17, the under face of which isslightly concave. l y

When it is necessary'to replenish the packing within the barrel 14, thescrew 13 is loosened and the segmental slide shifted so asto carry thebarrel out of alinement with the opening a. The slide is only shiftedsufthe slide itself. Then the cap 15 is removed with plastic packing,the plunger retracted to its full extent, the cap 15 replaced uponFigure l is an elevation of a stufling box the barrel; then the slide isagain shifted to bring thebarrel in alinement with the open- -ing a andthe screw 13 again tightened. Figure 2 is a plan view of the structureThen, from time to time,.as necessary, packing may be forced into thestuffing box or v gland. In this device, when at any time more packing1s necessary, the plunger screw .ficientlyrto entirely closethe openinga by causes the packing to fill into the threads and am. By this means,glands or stufling boxes may be packed, in which there is back pressureor fluid pressure and the loading barrel may be refilled without anydanger of the pressure being lost while doing so.

It will be noted that the slot 12 is of such length that when the screw13 is atone end of the slot, the loading barrel will be in exactalinement with the opening ti and that when the plate has been shiftedso that the screw 13 is at the other-end of the slot, the opening a willbe era off by the plate. Thus the slot not only provides means wherebythe plate may be clamped tight down againstthef'ace of the stuiiing box,but also means to indicate definitely whether the loading barrel is inalinenrent with the opening a or fully out of registry therewith.

It is to be particularly noted that in my loader, the screw 16 isconsiderably less in diameter than the interior of the diameter of theloadingjbarrel l4 and that this screw 16 has threaded engagement withthe cap 15 and not with the interior of the barrel. I have found inactual practice that where a plunger of this character has threaded engaein'ent with the interior of the face of the tar-rel, that the pressureinduced by the plunger will cause the packing to be forced upwardthrough the threads between the plunger and barrel and thus reduce thepressure on the packing and act to clog or prevent the easy turningmoveinent of the screw. I have illustrated a head I? which is swiveljledto the plunger 16, but I do not wish to be limited to this as the headmight be made ri id with the plunger 1'6. I find, however, that theswivelle'd head is preferable, for the reason that the head does notturn with the turn ing inoveinent of the plunger and does not act totwist the packing disposed below the pluiiger or (rtherwise distort itbut that the pressure is straight inward into the gland or stuffing box.w

The plate 10 slid'ably niou'n'ted upon the upper face of the gland "orstuffing box is particularly designed to be used in those "cases wherethere is back pressure but in case there is no back pressure, it iswithin the purviewof my invention to leave off this plate and con nectthe loa'cling barreldire'ctly to the stuffing box or like element.

Actual use has demonstrated that this stuffing box loader isofparticular advantage and particularly effective in actual practice andby its means, packing fijnay from time to time be forced into thestnifing box or gland without any chance of the hands of the open atorbecoming contaminated with the packing or b grease or anything of thatnature and furthermore, the pressure induced by the screw issufficiently great so that the hardest packing, provided it be plasticat all, may be forced into the stuffing box and fully pack the same.

Having described my invention, what I claim is 1. The combination with astalling box having an opening, of a supporting plate slidably mountedupon the stalling box, a loading barrel mounted upon the plate andadapted when the plate is shifted into one position to register with theopening in the stu'lling box, the late acting to close the opening inthe stuffing box when the barrel is shifted out of a position ofregistry with said opening, and a plunger mounted within the barrel.

2. The combination with a stuiling box having an opening, of asupporting plate slidably mounted upon the stuliing box, a loadingbarrel mounted upon the plate and adapted when the plate is shiftedintoone position to register with the opening in the stalling box, theplate acting to close the opening in the stufiing box when the barrel isshifted out of a position of registry with said opening, a plungermounted within the barrel having screw threaded engagement with thebarrel.

3. The combination with a stuifing box, of a plate slidably mounted uponone face of the smiling box, the stufling box having an 0 )ening, aloading barrel mounted upon the phate and adapted when the plate isshifted into one position to register with the opening in the stuilinbox, said plate acting whenshifted out of fins position to close theopening in the smiling box, a cap mounted upon the outer end of thebarrel, and a plunger having screw threaded engagement with the cap.

4:. The combination with a stuiling box, of a plate slidably mountedupon one face of the stufii-ng box, the stalling box having an opening,a loading barrel mounted upon the plate and adapted when the plate isshifted into one position to register with the opening in the stu'ihngbox, said plate acting when shifted outof this position to close theopening in the stu'liing box, a cap mounted upon the outer end of thebarrel, and a plunger having screw threaded engagement with the cap,said plunger having a swivelled head.

5. The. con'rbination of a stuili ng box having an opening, of a platepivotally mounted upon the face of the smiling box, the plate having aslot concentric to the pivot, a screw passing through the slot into thestuffing box, a loading barrel mounted upon said plate and adapted whenthe plate *is shifted in one position to register with the opening inthe stuffing box, said plate acting when shifted in another position toclose *the opening in the stuiling box, and a ,plunger having a s'ciev'vthreaded operative engagement with the loading barrel and having aswivelled plunger head.

6. The combination with a stutfing box having a filling opening, of asegmental plate disposed upon one face of the stuifing box and having anarcuate slot, a pivot screw passing through one end of the plate andinto the stuffing box, a screw passing through the slot in the plate andinto the stufling box, a loading barrel mounted upon the plate andadapted to be brought into registry with the opening in the stuffingbox, and a plunger having screw threaded engagement with the loadingbarrel.

7. A stuffing box loader comprising a supporting plate adapted to bemounted upon the face of a stufling box, means for shiftingly mountingthe plate upon the face of the stufling box, a loading barrel mountedupon the plate and adapted when the plate is shifted into one positionto register with the opening in the stufiing box, the plate acting whenshifted into another position to close the opening in the stuffing boxand a plunger hava ing screw-threaded engagement with the loadingbarrel.

In testimony whereof I hereunto aflix my signature.

FRANKLIN H. BROWN.

